Power mechanism.



P. W. HODGKINSON.

POWER MECHANISM.

APPLICATION FILED 00120, 1013 @5930 Patented Mar. 3, 1914.

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"to m frirr "r i Jili ii specification Letters Patent.

Application filed lictober so, rots. Serial No. 196,341.

chanisrns, oil which the following is o, eifieation.

.iis invention relates to oower meshesnri the oh iect of haven i re means for controlling speed inie niover or engine of any hincl, arrange the controlling means that lie latter automatically become inoperative ncler certain conditions.

The drawing illustrates the invention annlieol to the power plant of a motor "is, and shows a side elevation oi e and adjacent parts in a somewhat 'reininatic power transmission mechanisms risecl in motor vehicles, particularly those ring freight, it is desirable that see-ed. of the vehicleon the react shafl n e 'KCQECi a certain number of miles .1103?" is common practice, to meet this require went, to limit the road speeri by mean utornetio governing clevice which Will operthrottle the fuel-supply, out out the gnition, or in some other manner reduce the speed of the motor when the letter or the speed of the vehicle reaches a rerleter" linait. At times, however, it may he found that the limit of speecl set for the motor is too low, and that the automatic operation of the governor at such a time results in the production oi less power than is requirerl, as the power (lelirereoi icy a motor is proportional to its speerl. For instance, in attempting to drive a motor vehiele operated by an internal-combustion motor up a steep hill is common practice to run the rector up to its speecl limit, and then shift the transmission or gear-set to low-gear. When this is clone the hill can usually be negotiated successfully, as the motor running at high speeri is ableto clevelop for a time a greater amount of power than is needed in normal operation. lit the motor is throttled or otherwise helcl down to certain speerl limit by an automatic eversing" series, it cannot procluce the power necessary to move the vehicie under conriitions as just rlescrihecl, even though driving on lowgear, V

This invention overcomes the aforementioned difficulty by providing means Whereby the governing device, though normally operative, is automatically disconnected encl. rendeecl of no @5861; when the vehic ing *en in low-g, or. its gree revolutions of the motor are usual J quired to each revolution of the roacl Wheels or iii power shaft in low-gear it foliorrs e en though motor runs at speed, the "vehicle will not move faster the desired. iiinit of roecl speecl, and all; not eves that fast.

in the embodiment oi the iineiitioo mus I J tr-ares, ti" i .L is eores is a W know .3; riflaptcel to the use Oi is generate ins suitable car passing to the cylinders throu 'h pipe 3, A vs l o 3, an i e, sue moniy need to CO1 i the flow oi gas guise of this kind, onrl which is so arranges 1.10mi n :.L t is l movement the "valve on its mris through 90 degrees cs it from fully open to fully closed pos on. The ralve is operable through its iuii range of movement by an 5 outside the pipe 3, and this arm has a slot-enci-pin connection with one arm 6 of a bell cranlr lever that is pivoted st 3' on the motor. The upper arm 8 ol the hellcranlr lever engages an annular groove in collar 9., sliclahly mounted on a shaft it), which in turn is revoluloly supported in hearings ll.

one enci of the shaft 10, and also slicishly liiounteci upon it, is one member lit of a clutch. This inemlzer is arrangefl so that it always rotates with the shaft 10, regardless oi? its position on the latter. A spring" 13 between the member 12 and one oi the bearings 11 tends at all times to force said member into engagement with the other portion it of the clutch. The latter is tree to revolve upon the shaft 1'), but is arranged to "with the motor, anrl at a. speed that ire variably is proportionalto the motor speed. A convenient inethocl ct connecting the motor and; the clutch is illustrates as comprising a chain 15 running; on a sprocket 16 that is integral with the clutch-member 14:, and on another sprocket 17, fixed to the motorshaft.

The governor 18 which controls the speed of the motor is mounted on the shaft 10,

and is shown as an ordinary fly-ball governor, although it will be understood that any suitable device capable of performing the functions of a overnor may be used.

One pair of the ba -arms is attached to a collar 19, fixed on the shaft 10, while the other pair of arms are attached to the collar 9 that engages the end 8 of the bell-crank lever before described. A spring 20 tends to restore the governor to the position indicated, and in this position the valve 4. is fully open. When the motor is running the action of the governor moves the collar 9 toward the right and closes the valve a more or less, reducing the gas flow accordingly and thereby limiting the speed of the motor, as will be apparent'from reference to the drawing. The foregoing is commonpractice at the present time.

Located at a convenient point is a variable-speed mechanism 21, that is adapted to connect the motor with a shaft 22, (hereinafter called the driven shaft) and to establish different speed ratios between the motor and said shaft. Any mechanism may be employed which will accomplish this result, but the device shown herewith represents a sliding-gear transmission such as is in common use on motor-vehicles.

It is unnecessary to describe in detail the operation of the gear-set shown, the same being so well known in the art. Any desired speed ratio between the motor and the driven shaft 22 is obtained by moving the selector 23, which causes the engagement of certain gears, according to the direction of its movement.

In the drawing the arrangement of the gear-set is shown to be such that if the se lector is fixed to the pintle 40 on which it swings,a movement of the selector in the direction of the arrow results in a movement of the large gear 24. in the opposite direction. This brings the gear 24 into mesh with the gear 25 on the countershaft 26, which, in turn, is revolved by the gear 27 that is always in mesh with a smaller gear 28 on the motor shaft. The ear at being constructed to rotate only wit the driven shaft 22, it follows that the difi'erence in the relative speeds of the motor and the driven shaft will be greatest when the gears 24- and 25 are in mesh, or in other words, when the mechanism isoperating in lowat gear. To-render the governor inoperative at this time, means are provided whereby a movement of the selector as indicated will disengage the clutch-members 12 and 2A. A rod 29, slidebly mounted in fixed bearings,

t 5 carries a fork 30 that cooperates with an annu- 'lar groove on the member 12. An arm 31,

fixed to the selector or to the shaft 40, is so constructed as to push the rod 29 toward the left whenever the gear 24: is moved into mesh with the gear 25, but has no effect on said rod when any othergear is being moved by the selector. The aforesaid movement of the rod 29 disengages the clutchmemhers 12 and 14, so that the governor is no longer driven, but comes to rest in normal position, thereby opening the valve 4. The motor may then be controlled by the usual manually-operated throttle. 0n the carbureter or wherever it may be. This valve is not shown. A suitable clutch may be interposed between the motor and the variablespeed device, as indicated in the drawing by the numeral 35, the same being common practice, but forming no part of this invention.

The embodiment of the invention herein described and illustrated is intended merely as one mode of application, and the invention is not limited to this particular construction, but is capable of. use with any form of motor, having any overning apparatus, if a variable-speed device'of any type is interposed between the motor and the member or mechanism driven thereby, as defined in the following claims.

I claim:

1. In a power mechanism, the combination of a motor; a driven member; variablespeed mechanism between the motor and the driven member; a governor for the motor; and means whereby the governor is rendered inoperative when a'predetermined relative speed of the motor and the driven member is established.

2. In a power mechanism, the combination of a motor; a driven member; variablespeed mechanism for establishing diiferent speed-ratios between the motor and the driven member; a governor for the motor; and means whereby the governor is auto-' matically rendered inoperative at a predetermined point in the operation of the variable-speed mechanism.

3. In a? power mechanism, the combination of amotor; a driven member; variablespeed mechanism between the motor and the driven member; a governor for limiting the speed of the motor; and means cooperating with a member of the variable-speed mechanism whereby a movement of the latter renders the governor inoperative.

at. In a power "mechanism, the combination of a motor; a driven member;.variablespeed mechanism connecting the motor and driven member and adapted to produce difi'erent speed ratios between said motor and said driven member; a governor for the speed of the motor; and means for automatically renderin the governor inoperative when the varia le-speed mechtill anism is set to produce a predetermined speed ratio between the motor and the driven member.

5. In a power mechanism, the combination of a motor ;-a driven member; variablespeed mechanism between the motor and the driven member; a governor adapted to be operated by the motor; and means cooperating with the variable-speed mechanism whereby a given movement of the latter automatically disconnects the governor from the motor.

6. In a power mechanism, the combination of a motor; a driven member; variablespeed mechanism between the motor and the driven member adapted to be connected and disconnected with. both; a governor connected with the motor; andmeans cooperating with the variable-speed mechanism whereby a given movement of the latter automatically disconnects the governor from the motor.

7. Ina; power mechanism, the combination of a motor; a driven member; variablespeed'mechanism adapted to produce different speed ratios between the motor and the driven member; a governor operated by the motor; and means cooperating with the variablespeed mechanism whereby a predetermined movement of the latter reieases the governor from the motor and renders it inoperative.

8. In a power mechanism, the combination of a motor; a driven member variablespeed mechanism adapted to connect said motor and said driven member at difierent speed ratios; a governor operated by the motor and adapted to be disengaged therefrom; and means cooperating with one or more members of the variable-speed mechanism whereby at a predetermined movement of the latter the governor is disengaged from the motor.

9. In a power mechanism, the combination of a motor; a driven member; variablespeed mechanism between the motor and the driven member; a governor for the motor having a clutch connection therewith; and means operated through connections with the variable-speed mechanism whereby a predetermined movement of the latter disengages the clutch and renders the governor inoperative.

10. In a power mechanism, the combination of a motor; a driven member; variablespeed mechanism between the motor and the driven member for establishing difi'erent speed-ratios of one to the other; a governor for the motor; and connections between the variable speed mechanism and the governor whereby a predetermined movement of the variable-speed mechanism renders the governor inoperative.

11. In a power mechanism, the combination of a motor; a driven member; variablespeed mechanism between the motor and the driven member adapted to be connected with or disconnected from either said motor or said driven member, or both; a governor connected with the motor; and means adapted to be actuated by one or more members of the variable-speed mechanism whereby a predetermined movement of the latter disconnects the governor from the motor and renders it inoperative.

PERCY W. HODGKINSON.

Witnesses:

HOMER E. A. DICK, CLARENCE W. Gannon. 

